In recent years, along with the development of computational tools and computing capabilities, the development and application of distributed (parameter) model sets have been increasingly paid attention. This research attempts to introduce to the Vietnamese researcher community the W-flow modeling toolkit which has been widely used around the world and is an open-source model that has been integrated in the forecasting support software (Delft-FEWS). The Wflow_sbm model has been tested on a number of basins upstream of the Ma River (upto Xa La station) and Chu River (upto Hua Na reservoir) with the good results hence shows the applicability in the similar river basins in Vietnam.
Tien Chau estuary, Ky Lo river is in the south of Xuan Dai bay, An Ninh Dong commune, Tuy An district, Phu Yen province. In recent years, Tien Chau fishing port have been heavily deposited, waterway for boats are difficult. Several numbers of ships are tilted and sunk when entering the docking port, directly affecting the economic development of the province. In order to effectively dredge sand at the river mouth as well as serve the design of future plans at the river mouth, the study of the history of the river mouth is very necessary. The paper applies remote sensing technology to study the morphology of the estuary area over a long period, thereby finding out the morphological fluctuation trends in Tien Chau river mouth's revolution. The study results show that the estuary area is filled mainly by the change of the northern coastline of the mouth. In which, the length of the river mouth fluctuates quite stably in the range of 50-150 m. The strip of north bank of estuaries tends to curl and concave inland.
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